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Podiatric radiology exam 1
feet and stuff
41
Medical
Undergraduate 3
04/01/2009

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Cards

Term
what are the indications of a CT scan? (6)
Definition
  • Calcaneal Fracture,
  • Articular disorders,
  • tarsel Coalition,
  • foreign body localisation,
  • infection
  • congential disorders,
Term
What are 3 contraindications of CT scan
Definition
  • Pregancy and
  • contrast allergy,
  •  renal failure
Term
what are 4 advantages of Ct
Definition
  • easily absorbed,
  • fast scan time,
  • good resolution and detail,
  •  image manipulation (can get 3d images etc)
Term
what are 4 CT Disadvantages?
Definition
  • Dose is high,
  • Motion can cause beam hardening and streaks, weight,
  • poor soft tissue contrast, expensive,

 not portable

Term
what is 3 advantages of film digitisation?
Definition
  • Image is converted to digital,
  • data can be manipulated.
  •  can be send to radiologist for reporting
Term
What are 2 disadvantages of Digitisation of films?
Definition
  1. Inefficent
  2. limited data manipulation
Term
what are 4 advantages of CR?
Definition
  1. good image quality
  2. storage phosphors react to a rnage of xray exposures
  3. reduced need for repeat exposures
  4. abvle to print if req
  5. less space, time, money for chemicals etc
  6. allows post processing image manipulation
Term
what are 4 disadvantages of CR?
Definition
  1. cost of equipment
  2. new phosphor plates are $1500 each
  3. cost of converting old images
  4. scatter control is more important
Term

what are 4 advantages of DR?

Definition
  1. images are processed in seconds
  2. images are better quality than cr and film
  3. saves on film cost
  4. most practical for high volume departments
Term
what are 4 disadvantages of DR?
Definition
  1. need and entire new xray system
  2. costs about 500,000 for one detector
  3. detector plates are 150,000
  4. might need anm accessory CR system for mobile theatre work
Term
What are 4 advantages of the PACS system
Definition
  1. cost -increased efficiency
  2. productivity
  3. improved patient care
  4. remote access
  5. long term archiving
Term
what are the disadantages of PACS system
Definition
  1. equipment costs
  2. in transition need 2 systems
  3. potential systenm failure
  4. reduced interdepartmental consultation
  5. widespread training required
  6. quality of image depends on workstation your using.
Term
What is 4 indications for angiography?
Definition
  1. athersclerosis
  2. ischaemic Disease
  3. Dissection
  4. Stenosis
  5. Thrombus
  6. Chronic Occlusion
  7. Traumatic rupture/occlusion
Term
What are 4 speci
Definition
Term

PTA used which radiographic technique? what does it stand for/

 

Definition
  1. DSA - digital substraction Angiography
  2. percutaneous Transluminal angioplasty
  3. used for suspected occlusions stenosis, avm, haemangioma
Term
what are 4 C/I of DSA/
Definition
  1. Pregnancy
  2. Allergy to contrast
  3. renal impairment
  4. unstable Patient
  5. Inability to lie flat
  6. recent barium procedure
Term
name 4 advantages of DSA?
Definition

- allows therapeutic catherisation of specific blood vessles

therapeutic procedure may be performed that makes surgery unneccesary

Term
What are disadvantages of DSA?
Definition
  1. high radiation to pt and staff
  2. possible nephrotoxity to contrast
  3. blood product exposure 
  4. invasive procedure
  5. expensive
Term
what are the 2 types of nuclear medicine investigations?
Definition
  1. PET - Positron Emission Tomography
  2. SPECT - Single Photon Emission 
Term
what are 4 indications nuclear medicine may be benifical/
Definition
  1. cancerof breas, prostrate, and others that can spread to bone
  2. trauma not visibleon xray
  3. stress fracture
  4. shin splint
  5. osteomyelitis
  6. atypical bone pain
Term
what are 4 contraindications of Nuclear medicine?
Definition

trick question! there are 2!

  1. pregnancy
  2. breast feeding
Term
Advantages of Nuclear medicine
Definition
  1. high sensitivity for ealry detection
  2. low risk of allergic response
Term
Disadvantage of nuclear medicine
Definition
  1. low resolutio images
  2. not specific
  3. takes about4 hours
  4. NM are highly specialised departments
Term
what are 4 indications of MRI technology/
Definition

Soft tissue pathology....

  1. ligament damage
  2. tendonitis
  3. Masses, cysts, tumour
  4. musculoskeletal #
  5. compartment syndrome
Term
Contraindications of MRI? name at least 4
Definition
  1. metallic fragments behind eye
  2. pacemakers
  3. aneurysm clips
  4. recent orthopaedic and dental hardware
  5. claustrophic
  6. fat patients
  7. cochlear eye implants
  8. spinal stimualtion
  9. inserted pumps
  10. some artificial valves
Term
What are the major advantages of MRI/(5)
Definition
  1. NO ionising radiation is used
  2. superior soft tissue contrast
  3. can scan in any plane
  4. can tailor parameter to suite a specific q
  5. can image blood flood in nealry any part of body wo/ injection of contrast
Term
What are the disadvantages of MRI?
Definition
  1. 5% of pts are claustrophobic
  2. some ots may be c.i with implants
  3. cant scan fat people
  4. motion artefacts
  5. very expensive scan (400-600)
Term
what is tomography used for?
Definition
blur structures which are in front or behind of area of interest
Term
what do xrays land on in fluroscopy?
Definition
image intensifier
Term
what is a major advantage of fluroscopy/
Definition
  1. dynamic images that permits accurate position prior to conventional radiograph
Term
what is a disadvantage of fluroscopy
Definition
image quality is not as good as conventional xray, so usuing this is done as well
Term
in arthrography what the 2 distinctions, and waht makes them different
Definition
  1. single contrast -  just radio-opaque material (usually iodine based) is injected into joint
  2. double contrast - radio-opaque and air are injected
Term
what are some indications for arthrography?
Definition
  1. ligament injury
  2. soft tissue trauma
  3. adhesive capsulitis
  4. evualte cartilage
  5. loose bodies in joint
Term
what are 3 contraindications of arthrography?
Definition
  1. Pregnancy
  2. allergry to contrast
  3. infection
Term
What are possible complicatiosn with arthography
Definition
  1. infection, local tissue damage, contrast reaction
Term
what is a major problem with lymphangiography?
Definition
  1. long and technically difficult
Term
name 2 indications for lymphangiography
Definition
  1. investigation of primary and secondary lymphoedema
  2. evaluate metastic involvemnt of lymph
Term
what are 4 contraindications of lymphangiography...
Definition
  1. pregnancy
  2. allergy to contrast
  3. local sepsis
  4. poor renal function
Term
name 4 indications of venography
Definition
  1. DVT
  2. assess distribution of varicosities prior to surgery
  3. demonstrate communication between deep vessels
  4. reccurent varicosities
Term
what are some contraindications of venography
Definition
  1. poor renal function
  2. pregnancy
  3. local sepsis
  4. contrast allergy
Term
name 5 possible complicatiosn with venography?
Definition
  1. infection,
  2. contrast reaction
  3. extravasation
  4. haematoma
  5. pulmonary embolus
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